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  #1  
Old 01-31-2021, 04:02 PM
kens_cockpit kens_cockpit is offline
 
Join Date: Jan 2005
Location: Launceston, Tasmania, Australia
Posts: 83
Default Aileron Rigging

I am not getting the minimum travel for the ailerons.

Using an iPhone level app on the bottom of the aileron close to the outboard hinge point I am getting the following:
Left wing 19.9 degrees up and 12.3 degrees down (from a 4.7 degree slope on the bottom of the aileron in the neutral position)
Right wing 19 degrees up and 13 degrees down (from a 4 degree slope on the bottom of the aileron in the neutral position)

The minimum travel required is 25 degrees up and 15 degrees down.

Am I measuring from the right place? Is it the hinge or the "neutral" line from the trailing edge of the aileron to the tooling holes that the angle is measured from?

I have put the ailerons in neutral using the tooling holes and set the bell crank at neutral using the supplied jig. I'm not sure what I have done wrong. I did not clamp the ailerons in place when setting the neutral position but I made sure the bellcrank jig was up against the spar and checked the trailing edge against the top and bottom of the correct tooling holes in the with a straight edge multiple times. Perhaps I just haven't been accurate enough in that but I checked and rechecked carefully. I have then adjusted the tubes from the bellcrank to the control stick.

If I leave things as they are the control stops will almost be unable to connect with the inboard hinge bracket.

It seems to me if I lengthen any of the tubes to get more throw I will lose the neutral aileron position. But maintaining the neutral aileron position doesn't give me enough movement.

I'll go back and recheck everything but just wondering if anyone else has had to deal with this issue and how you resolved it.
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  #2  
Old 01-31-2021, 11:34 PM
skylor's Avatar
skylor skylor is offline
 
Join Date: Aug 2009
Location: Southern California
Posts: 967
Default What is stopping them?

Quote:
Originally Posted by kens_cockpit View Post
I am not getting the minimum travel for the ailerons.

Using an iPhone level app on the bottom of the aileron close to the outboard hinge point I am getting the following:
Left wing 19.9 degrees up and 12.3 degrees down (from a 4.7 degree slope on the bottom of the aileron in the neutral position)
Right wing 19 degrees up and 13 degrees down (from a 4 degree slope on the bottom of the aileron in the neutral position)

The minimum travel required is 25 degrees up and 15 degrees down.

Am I measuring from the right place? Is it the hinge or the "neutral" line from the trailing edge of the aileron to the tooling holes that the angle is measured from?

I have put the ailerons in neutral using the tooling holes and set the bell crank at neutral using the supplied jig. I'm not sure what I have done wrong. I did not clamp the ailerons in place when setting the neutral position but I made sure the bellcrank jig was up against the spar and checked the trailing edge against the top and bottom of the correct tooling holes in the with a straight edge multiple times. Perhaps I just haven't been accurate enough in that but I checked and rechecked carefully. I have then adjusted the tubes from the bellcrank to the control stick.

If I leave things as they are the control stops will almost be unable to connect with the inboard hinge bracket.

It seems to me if I lengthen any of the tubes to get more throw I will lose the neutral aileron position. But maintaining the neutral aileron position doesn't give me enough movement.

I'll go back and recheck everything but just wondering if anyone else has had to deal with this issue and how you resolved it.
What is limiting the travel of your ailerons? I.E what is causing them to stop before they reach full travel?

Skylor
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  #3  
Old 02-01-2021, 12:27 AM
kens_cockpit kens_cockpit is offline
 
Join Date: Jan 2005
Location: Launceston, Tasmania, Australia
Posts: 83
Default Aileron Rigging - What's stopping them

What is limiting the travel of your ailerons? I.E what is causing them to stop before they reach full travel?

OK so that really was the right question.

Laugh with me or at me if you will.

I got home from work today having stressed about this all day. I checked the bell cranks - no interference there. I checked the control column, no interference there.

I went out to the tip of the right wing. Sitting under the wing is a plastic rubbish bin!! It was touching the leading edge of the right aileron at "full" deflection. Remove the bin and now I'm getting close to 35 degrees up on both wings and 14.9 to almost 17 degrees down.

What a goose. I don't mean to insult geese.

Stand down. Problem solved.
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RV8 QB

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We inhabit a mystery. We should not pretend to know too much.
-Eugene Peterson
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  #4  
Old 02-01-2021, 04:01 AM
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PaulvS PaulvS is offline
 
Join Date: Aug 2019
Location: Western Australia
Posts: 567
Default

We will laugh with you, despite the cruel jokes about Tasmanians!
Glad you got it sorted!
P.
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Building RV-6A #22320 O-320 FP. Wings and tail complete, working on fuselage
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build
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  #5  
Old 02-01-2021, 01:17 PM
gasman gasman is offline
 
Join Date: Mar 2007
Location: Sonoma County
Posts: 3,939
Default

There needs to be some kind of an award.

We have all done something like this and had to sit back and laugh.
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